Power-up confirmation: No problems. Regarding operational checks, there are no issues with hot air, cold air, or button switching and response. However, when set to high wind, there are occasional moments where the airflow seems to weaken slightly. Also, I feel the sound is a bit loud, but since I haven't used a product from the same manufacturer before, I don't know if it's normal... It doesn't pose much of a problem in use, but considering these circumstances, this item is being sold as junk. There are scratches and stains, so please examine the images carefully before considering a purchase.